Patent GB-190808648-A (GB)
Title: Improvements in and relating to Liquid Fuel Burners.
Inventor: DUGGAN COLLINGWOOD ROSS
Filed: 1908-04-18
Granted: 1909-04-15
Abstract: 8648. Duggan, C. R. April 18. Atmospheric vapour burners; vaporizing- apparatus.-A vapour burner for heating a steam generator &c. comprises a group of burner tubes and two. or more vaporizers, and is fitted with means whereby one of the vaporizers is heated first by gas, and then, together with one or more of the other vaporizers, by vapour supplied solely by the first vaporizer, thus heating the second and other vaporizers preparatory to passing oil through them as in normal working. The invention also comprises a needle valve for regulating the flow of fuel to or from the vaporizer, and a device, shown in Fig. 10, for preventing back-firing in the burner tubes, The burner shown in Fig. 1 consists of a row of horizontal tubes 14 ... 21; the tubes 14, 15, 17 are attached to a common mixing-chamber 18, and the group of 'tubes 21 to a chamber 20, the tube 16 containing the valve-like controlling-device 22, 23 being connected to both of these chambers 18, 20. There are two vaporizers 1, 2, shown by dotted lines. The vaporizer 1 above the burner tubes 14, 15 communicates with a regulator 10 and nozzle 12, which are adjacent to a mixing-tube 13 beneath the tube 14. The vaporizer 2 above .the tubes 16, 17 is connected to a similar regulator 9 and nozzle 11, which are adjacent to a mixing- chamber 19 beneath the tubes 21. The regulators 9, 10 have connexions 43, 42 for gaspipes, which are for use principally when starting the burner. For this purpose, the controlling-device, which consists of two cylindrical rotary valves 22, 23 connected by a rod 24 with a pin-and-slot connexion, is rotated a half-turn from the position shown in Fig. 1, and the part 22 is drawn back until the port.31 is closed. The burner tubes 14, 15 are thus separated from the rest of the burrier, and gas is supplied to them until the vaporizer 2 becomes red hot. The gas is then cut off and oil is passed into the vaporizer 1. The controlling-device is next adjusted to the position shown in Fig. 1, so as to supply vapour to the tubes 14, 15, 16, 17, and to heat both of the vaporizers 1, 2. The oil is then turned on to the vaporizer 2, and the burner is set in ordinary working order. By rotating the controlling-device through a half-turn from the position shown in Fig: 1, a free passage is made between all parts of the burner through the port 35 and.-the tube 16, and by closing one of the conical caps 111 (of which only one is shown) against the mouths of the mixing-tubes 13, 19, either of the vaporizers may be used to supply all the burner tubes with vapour, or gas may be supplied to all parts of the burner by means of the connexions 42, 43. In modifications, the tubes 21 are connected alternately or otherwise to the chambers 18, 20. The regulator 9 or 10, shown in sectional plan in Fig. 9, consists of a needle valve 40 operated by an eccentric 38 and a connecting-rod jointed at 41 to the valve 40. The eccentric is on a shaft 37 fitted also with arms 62, 62<A>. connected by links 62<B> with the cap 111. One of these regulators 9, 10 is operated by hand, and the other by the automatic operating-mechanisms described in Specification No. 21,476, A.D. 1908, [Abridgment Class Heating]. To prevent back-firing, T- iron strips 106, Fig. 10, are placed between the burner tubes, their edges being spaced from the tubes so as to allow a thin film of air to pass upwards and cool the tubes.